Welcome to the forum Frank.
You might feel easyer if i tell you that you are not the older one. I am 61, and i enjoy this forum, even if i never been in Japan nor speak any of the language.
Congratulation on bilding you computer, now you have entered in hard area, since once you start bilding computers, you will never stop, you always liket to add more memory, better video card, and other hard ware.
My husband bilds computers for me, i have 5 of them. they are connected , all of them to one monitor and one key borard, with KVM switch.
I use my computers for bussiness, and adventure game playing, and couse, to come on internet
Nice to have you with us. Enjoy your staying.
Good day to you,
Cathy